Fix a sending signal error when starting Doris BE (#367)
Fix a sending signal error when starting Doris BE (#367)

Redirect output message of kill to /dev/null.

Co-Authored-By: chalsliu <809687663cdfbbe94b71f7fb5ced6a07fd4c8dc7@users.noreply.github.com>

ISSUE #365
imay/palo,imay/palo,imay/palo,imay/palo,imay/palo,imay/palo